BAPI BAPI_CONTRACT_CHANGE is not update values for condition based on percentage discounts.

Hi,

I americium trying to update information records connected Purchasing contracts using BAPI_CONTRACT_CHANGE. However, the BAPI does not update values for condition based connected percentage. Could you proposal maine connected the mandatory fields which request to beryllium supplied to oregon and config settings to beryllium maintained to marque it work? Have attached screengrab of the values I americium passing.